Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Due after three years through four years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Four Activity in the voluntary non-AHP Contributions Activity in the voluntary non-AHP Contributions [Table Text Block] Activity in the voluntary non-AHP Contributions Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Subsequent Event Subsequent Event [Member] Carrying Value [Member] Reported Value Measurement [Member] Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Federal Housing Finance Agency Regulator Expenses, Cost Assessed on Federal Home Loan Bank Document Fiscal Year Focus Document Fiscal Year Focus Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Cash collateral posted Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Financial Instrument [Axis] Financial Instrument [Axis] Proceeds from issuance of consolidated obligations: Proceeds from Issuance of Long-Term Debt [Abstract] Retained Earnings, Unrestricted [Member] Retained Earnings, Unappropriated [Member] Due or convertible after five years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, after Rolling Year Five Depreciation and amortization (accretion) Depreciation, Amortization and Accretion, Net Accrued Interest Receivable, Advances Disclosure Accrued Interest Receivable, Advances Disclosure Accrued Interest Receivable, Advances Disclosure Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring After One Year Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring After One Year The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition, which expire after one year of the balance sheet date. Bonds, Due after one year through two years, weighted average interest rate Long-term Debt, Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturing in year two following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Authorized voluntary non-AHP contributions Authorized voluntary non-AHP contributions Authorized voluntary non-AHP contributions Federal Home Loan Bank, Advances Federal Home Loan Bank, Advances [Table Text Block] Cash collateral received Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Long-term Debt By Maturity Type [Axis] Long-term Debt By Maturity Type [Axis] Information about Consolidated Obligations' date of contractual maturity or next call date. Other, net Other Noninterest Expense Measurement Frequency [Axis] Measurement Frequency [Axis] Held-to-maturity securities Interest Income, Debt Securities, Held-to-Maturity Total mortgage loans held for portfolio Financing Receivable, Accrued Interest, before Allowance for Credit Loss Mortgage Loans Held for Portfolio Financing Receivables [Text Block] Amendment Flag Amendment Flag Number Of Outstanding Standby Letters Of Credit Renewable Annually Number Of Outstanding Standby Letters Of Credit Renewable Annually Number of outstanding standby letters of credit, renewable annually. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Basis Adjustments for Active Hedging Relationships Included in Amortized Cost Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease) Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, active as of the balance sheet date. Proceeds from principal collected Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Gross unrealized loss on available-for-sale securities Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Standby Letters of Credit [Member] Standby Letters of Credit [Member] Common Stock Dividend-Annualized Rate Common Stock Dividend-Annualized Rate Common Stock Dividend-Annualized Rate Federal Home Loan Bank, Advances [Text Block] Federal Home Loan Bank, Advances [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Investment Holdings[Table] us-gaap_InvestmentHoldingsTable [Table] us-gaapThe investment holdings table is used for any listing of investments. The "Investment [Axis]" identifies the investment for which the line items apply. The other axes are used for categorizing the investments and creating useful subtotals. These axes cover different categorizations. The appropriate axes are expected to be used. Additional axes can be added for alternative categorizations._ Bonds Federal Home Loan Bank, Consolidated Obligations, Bonds Federal Home Loan Bank, Consolidated Obligations, Bonds Unpaid principal balance Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Schedule of Compliance With Regulatory Capital Requirements Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Consolidated obligations, net: Federal Home Loan Bank, Consolidated Obligations [Abstract] Held-to-maturity Debt Securities, Held-to-Maturity [Table Text Block] Voluntary non-AHP expense Voluntary non-AHP contributions Commitment by the FHLB to contribute towards Voluntary (non-AHP) other housing and community investment activities above the required statutory contributions Entity Address, State or Province Entity Address, State or Province Available-for-Sale, Unrealized Loss Position, Accumulated Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Definition of shareholder concentration, percentage Transactions with Shareholders Definition of Shareholder Concentration Regulatory Capital Stock Percent Shareholders whose regulatory capital stock holdings exceeded 10 percent of total regulatory capital stock outstanding. Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Capital stock Class B putable par value (per share) Common Stock, Par or Stated Value Per Share Assets: Assets, Fair Value Disclosure [Abstract] Derivative, Notional Amount Derivative, Notional Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Advances Ten Largest Borrowers Percent of Total Federal Home Loan Bank Advances Ten Largest Borrowers Percent of Total Federal Home Loan Bank Advances, Ten Largest Borrowers, Percent of Total Bonds, Due after four years through five years Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Five Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Interest-bearing deposits (including deposits with other FHLBanks of $4 as of June 30, 2026 and December 31, 2025) Interest-Bearing Deposits in Banks and Other Financial Institutions Non-cash collateral pledged by the individual counterparty, in excess of the total derivative position Non-cash collateral pledged by the individual counterparty, in excess of the total derivative position. Non-cash collateral pledged by the individual counterparty, in excess of the total derivative position. Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Total noninterest income Noninterest Income Available-for-sale securities, amortized cost Available-for-sale securities, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Allowance for credit losses on advances Federal Home Loan Bank, Advances, Allowance for Credit Losses on Advances Allowance for Credit Losses on Advances Entity Address, City or Town Entity Address, City or Town Financing Receivable Allowance [Domain] Class of Financing Receivable [Domain] Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Federal funds sold Interest Income, Federal Funds Sold Class of Stock [Axis] Class of Stock [Axis] Authorized voluntary non-statutory AHP contributions Authorized voluntary non-statutory AHP contributions Authorized voluntary non-statutory AHP contributions Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Receivable [Domain] Receivable [Domain] Schedule of Transactions with Shareholders [Table Text Block] Schedule of Transactions with 10 Percent Shareholders [Table Text Block] Tabular disclosure of shareholder concentration with members and non-members that held ten percent or more of regulatory capital stock. Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Amortized cost of held -to-maturity securities due in one year or less Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling within One Year Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Total par value Federal Home Loan Bank, Advances, Par Value Federal Home Loan Bank, Advances, Par Value Subsequent Event Type [Axis] Subsequent Event Type [Axis] The FHLBank's outstanding consolidated obligations for which the Bank is jointly and severally liable Consolidated Obligation, Jointly and Severally Liable The FHLBank's outstanding consolidated obligations for which the reporting entity is jointly and severally liable. Derivative, Collateral, Obligation to Return Securities Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Mortgage loans held for portfolio, net Mortgage loans held for portfolio, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Recently Issued But Not Yet Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Bonds Unsettled Consolidated Obligation Bonds [Member] Unsecured Debt [Member] Total consolidated obligations, net Federal Home Loan Bank, Consolidated Obligations Cleared derivatives [Member] Exchange Cleared [Member] Debt Instrument Call Feature [Domain] Debt Instrument Call Feature [Domain] Provides general categories of debt call features for which information is required or determined to be disclosed. Risk-based capital, Required Federal Home Loan Bank, Risk-Based Capital, Required Voluntary Contributions Voluntary Contributions [Abstract] Voluntary Contributions Allowance for credit losses on mortgage loans Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Due after one year through five years, estimated fair value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Noncash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Document Period End Date Document Period End Date Net change in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Bonds par value Bonds par value Discount notes par value Debt Instrument, Face Amount Due in one year or less Federal Home Loan Bank, Advances, Maturities Summary, in Next Rolling 12 Months Capital Equity [Text Block] Voluntary housing and community investment VoluntaryNonStatutoryContributionsToAHP Amount of voluntary non-statutory contributions to Affordable Housing Program(AHP Net adjustment and cash collateral Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Transactions with Shareholders [Domain] Transactions with Shareholders [Domain] Transactions with Shareholders [Domain] Affordable Housing Program payable Increase Decrease in Affordable Housing Program Assessments The increase (decrease) during the period in amount of the obligation related to Affordable Housing Program (AHP) assessments, as required by the Federal Home Loan Bank Act of 1932. These AHP funds provide subsidies to members to assist in the purchase, construction, or rehabilitation of housing for very low-, low-, and moderate-income households. Entity Shell Company Entity Shell Company Capital [Abstract] Banking Regulation, Total Capital [Abstract] Interest-bearing Deposits Interest-Bearing Domestic Deposit, Demand Advances Total Federal Home Loan Bank Advances Federal Home Loan Bank, Advance Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Truist Truist [Member] Truist Total regulatory capital, Actual Regulatory Capital Stock Outstanding Federal Home Loan Bank, Regulatory Capital, Actual Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Debt Instrument Interest Rate Payment Terms Name [Domain] Debt Instrument Interest Rate Payment Terms Name [Domain] Debt instrument interest rate payment terms, name. Noncallable [Member] Federal Home Loan Bank, Consolidated Obligations, With No Related Option [Member] Financial instrument of the Federal Home Loan Bank that does not have an option associated with it. Document Fiscal Period Focus Document Fiscal Period Focus Derivative, Collateral, Right to Reclaim Securities Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Net income Net income Net Income (Loss) Attributable to Parent, Net of Federal Home Loan Bank Assessments Total liabilities Liabilities Leverage capital, Actual Federal Home Loan Bank, Leverage Capital, Actual Amortized cost of held-to-maturity securities due after one year through five years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after One through Five Years Available-for-sale securities (amortized cost of $13,787 and $8,908 and includes $20 and $0 pledged as collateral as of June 30, 2026 and December 31, 2025, respectively) Available-for-Sale, Estimated Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Recapture amounts and other Affordable Housing Programs Recaptured Amounts and Other Affordable Housing Program amounts recaptured that were previously distributed and other amounts, net. Transaction [Domain] Transaction [Domain] Purchases of long-term Payments to Acquire Debt Securities, Available-for-Sale B1 Membership Stock Shares Issued and Outstanding fhlba: Subclass B1 Membership Stock Shares Issued and Outstanding fhlba: Subclass B1 Membership Stock Shares Issued and Outstanding AHP Homeownership Set-aside Program AHP Homeownership Set-aside Program AHP Homeownership Set-aside Program Total regulatory capital ratio, Required Regulatory Capital Ratio, Required Regulatory capital ratio requirement as defined in the regulations. Workforce Housing Plus+ Program Workforce Housing Plus Workforce Housing Plus Discount notes Interest Expense, Consolidated Obligation Discount notes Interest Expense, Other Short-Term Borrowings Net change in derivative and hedging activities Unrealized Gain (Loss) on Derivatives Pension and Postretirement Benefits [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Derivatives Not Designated as Hedging Instruments [Table Text Block] Derivatives Not Designated as Hedging Instruments [Table Text Block] Consolidated Obligation Bonds [Member] Consolidated Obligation Bonds [Member] Amount of joint and several obligations consisting of bonds issued by the Federal Home Loan Bank. Due after one year through two years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Two Bonds, Due after one year through two years Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Voluntary non-AHP contributions liability, at beginning of period Voluntary non-AHP contributions liability, at end of period Voluntary non-AHP contributions liability Voluntary non-AHP contributions liability Beginning balance (shares) Ending balance (shares) Shares, Issued Grantor trust assets (included in Other assets) (1) Grantor Trust Assets Included in Other Assets, Fair Value Disclosure Grantor Trust Assets Included in Other Assets Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Interest-bearing deposits Proceeds from (Payments for) in Interest-Bearing Deposits in Banks Entity Emerging Growth Company Entity Emerging Growth Company Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] ScheduleOfAvailableForSaleSecuritiesTable [Line Items] ScheduleOfAvailableForSaleSecuritiesTable [Line Items] ScheduleOfAvailableForSaleSecuritiesTable [Line Items] US Treasury Securities [Member] US Treasury Securities [Member] Standby Letters Of Credit Issued Renewable Annually Standby Letters Of Credit Issued Renewable Annually Standby letters of credit issued, renewable annually. Gross Unrealized Losses on held-to-maturity securities Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Total fixed-rate Federal Home Loan Bank, Advances, Fixed Rate Subclass B3 standby letters of credit activity based value outstanding fhlba: Subclass B3 standby letters of credit activity based value outstanding fhlba: Subclass B3 standby letters of credit activity based value outstanding Held-to-maturity securities: Proceeds from Sale and Maturity of Held-to-Maturity Securities [Abstract] Derivative Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Interest-bearing Deposits, Fair Value Disclosure Interest-bearing Deposits, Fair Value Disclosure Fair value disclosure of - For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. Debt Instrument Call Feature [Axis] Debt Instrument Call Feature [Axis] Information about specific debt instruments call features. Restricted Retained Earnings, Appropriated Held-to-Maturity, Accrued Interest Receivable Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss Subclass B2 advances activity-based Stock Shares Issued and Outstanding fhlba: Subclass B2 advances activity-based Stock Shares Issued and Outstanding fhlba: Subclass B2 advances activity-based Stock Shares Issued and Outstanding Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Interest income Interest and Dividend Income, Operating [Abstract] Net unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, before Tax, Portion Attributable to Parent Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Off Balance Sheet Commitments [Table Text Block] Other Commitments [Table Text Block] Derivative Assets Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Available-for-sale securities Debt Securities, Available-for-Sale [Abstract] Hedged Items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Capital stock Class B putable ($100 par value); 59,563,284 and 56,080,870 as of June 30, 2026 and December 31, 2025, respectively Total capital stock Class B putable Common Stock, Other Value, Outstanding Repurchase/redemption of capital stock value Stock Repurchased and Retired During Period, Value Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Amortized Cost of held-to-maturity securities due after five years through ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years Voluntary grants and donations Payments Made for Non-AHP Programs Amount of cash outflow for payments made by the Federal Home Loan Banks (FHLBanks) to Voluntary contributions (non-AHP). Financing Receivable Amortized Cost by Class of Financing Receivable [Domain] Financing Receivable Amortized Cost by Class of Financing Receivable [Domain] Financing Receivable Amortized Cost by Class of Financing Receivable [Domain] Bonds, Due in one year or less Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months Due or convertible after one year through two years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Two Cash paid for: Interest and Assessments Paid [Abstract] Interest and Assessments Paid [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Government-guaranteed or insured mortgage loans [Member] US Government Agency Insured Loans [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Derivatives Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Investments in Debt Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Retained Earnings, Restricted [Member] Retained Earnings, Appropriated [Member] Cash dividends paid Payments of Ordinary Dividends, Common Stock Net increase in cash and due from banks Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Hedging Relationship [Axis] Hedging Relationship [Axis] Due or convertible in one year or less Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Next Rolling 12 Months Derivative Liabilities Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Liabilities Liabilities [Abstract] Standby letters of credit fees Standby letters of credit fees Fees related to Stand by letters of credit Held-to-maturity securities Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Other liabilities Other liabilities Other Liabilities Derivative [Table] Derivative [Table] Mortgage Loans on Real Estate, Original Contractual Terms Mortgage Loans on Real Estate, Original Contractual Terms Mortgage Loans on Real Estate, Original Contractual Terms Transactions With Shareholders TransactionsWithShareholders [Text Block] Disclosure of shareholder concentrations as members or non-members with more than 10 percent of the Bank's total regulatory capital stock. Other, net Noninterest Income, Other Operating Income Proceeds from issuance of capital stock Proceeds from Issuance of Common Stock Bonds, Due in one year or less, weighted average interest rate Debt, Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturing within the next twelve months following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Interest-bearing deposits Deposits, Fair Value Disclosure Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Held-to-maturity securities (fair value of $22,160 and $24,509 as of June 30, 2026 and December 31, 2025, respectively) Held-to-Maturity, Amortized Cost Held-to-maturity securities Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Fair Value, Recurring [Member] Fair Value, Recurring [Member] Due after two years through three years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Three Total voluntary housing and community investment Voluntary housing contribution Voluntary housing contribution Document Quarterly Report Document Quarterly Report Interest-rate swaps [Member] Interest rate swap [Member] Interest Rate Swap [Member] State or local housing agency debt obligations [Member] US States and Political Subdivisions Debt Securities [Member] Consolidated Obligations Debt Disclosure [Text Block] Accrued interest payable Interest Payable Interest Payable Conventional Mortgage Loan [Member] Conventional Mortgage Loan [Member] Mandatorily redeemable capital stock Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount U.S. agency obligations-guaranteed residential [Member] SingleFamilyMortgageBackedSecuritiesOtherUSObligation [Member] Debt securities collateralized by single family real estate mortgage loans (mortgages), issued by US government agencies, such as the Government National Mortgage Association (GNMA or Ginnie Mae). Excludes mortgage backed securities issued by Government-sponsored Enterprises (GSEs), which are not backed by the full faith and credit of the US Unrestricted Retained Earnings, Unappropriated Schedule of Transactions with Shareholders [Table] Schedule of Transactions with Shareholders [Table] Schedule of Transactions with Shareholders [Table] Fixed-rate, due after one year Federal Home Loan Bank, Advance, Fixed Rate, after Year One Equity Component [Domain] Equity Component [Domain] Mortgage loans held for portfolio, net Loans Receivable, Fair Value Disclosure Due or convertible after three years through four years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Four Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring Within One Year Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring Within One Year The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition, which expire within one year of the balance sheet date. Cash dividends on capital stock Dividends, Common Stock, Cash Dividends, Common Stock, Cash Total capital Beginning balance Ending balance Stockholders' Equity Attributable to Parent Equity, Attributable to Parent Federal funds sold Federal Funds Sold Real Estate [Domain] Real Estate [Domain] Discount notes Proceeds from Other Short-Term Debt Assets Assets [Abstract] Non-mortgage backed securities [Member] Other Than Mortgage Backed Securities [Member] Represents the total of non-mortgage backed securities, which may be issued by federal, state or local government and/or by other non-mortgage related entities Step up/down [Member] Interest Rate Payment Type Step Up or Down [Member] Interest-rate payment type step up or down. Fixed-rate [Member] Fixed Interest Rate [Member] Financial instruments with a fixed rate of interest. Mortgage loans Interest and Fee Income, Loans, Consumer, Real Estate Transactions With Shareholders [Abstract] Transactions With Shareholders [Abstract] Transactions With Shareholders [Abstract] Held-to-maturity securities, fair value Estimated fair value of held-to-maturity securites Held-to-maturity securities, fair value Debt Securities, Held-to-Maturity, Fair Value Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Percent of Total Regulatory Capital Stock Outstanding Federal Home Loan Bank Shareholder Percentage of Total Regulatory Capital Stock Outstanding Represents Federal Home Loan Bank shareholder percentage of total regulatory capital stock outstanding. Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Advances past due Federal Home Loan Bank, Advances, Past Due Advances Past Due Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Voluntary AHP expense Voluntary Affordable Housing Program Expense Voluntary contribution to Affordable Housing Programs. Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Subclass B3 stand by letters of credit activity-based stock Issued and Outstanding fhlba: Subclass B3 stand by letters of credit activity-based stock Issued and Outstanding fhlba: Subclass B3 stand by letters of credit activity-based stock Issued and Outstanding Entity Central Index Key Entity Central Index Key Securities purchased under agreements to resell Interest Income, Securities Purchased under Agreements to Resell Uncleared derivatives [Member] Over-the-Counter [Member] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Residential Portfolio Segment [Member] Residential Portfolio Segment [Member] Interest-bearing deposits Interest Income, Deposits with Financial Institutions Income Statement [Abstract] Income Statement [Abstract] Capital Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Federal Home Loan Bank, Affordable Housing Program Obligation [Roll Forward] Federal Home Loan Bank, Affordable Housing Program Obligation [Roll Forward] Schedule of Available-for-sale Securities [Table] ScheduleOfAvailableForSaleSecuritiesTable [Table] Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. Earlier of Contractual Maturity or Next Call Date [Member] Earlier of Contractual Maturity or Next Call Date [Member] Consolidated Obligations categorized by earlier of contractual maturity or next call date. InvestmentSecuritiesAcquiredWithAccruedLiabilities HeldToMaturitySecuritiesAcquiredWithAccruedLiabilities HeldToMaturitySecuritiesAcquiredWithAccruedLiabilities Bonds, Due after five years Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five Payments for maturing and retiring consolidated obligations: Repayments of Long-Term Debt [Abstract] Financing Receivable Amortized Cost by Class of Financing Receivable [Axis] Financing Receivable Amortized Cost by Class of Financing Receivable [Axis] Information by class of financing receivable determined on the basis of initial measurement attribute, risk characteristic and method of monitoring and assessing credit risk. Number of Top Advances Borrowers Number of Top Advances Borrowers Number of Top Advances Borrowers Interest-bearing deposits Interest-Bearing Deposit Liabilities, Domestic City Area Code City Area Code Held-to-maturity Securities [Member] Held-to-Maturity Securities [Member] Definition of related party, minimum percent RelatedPartyTransactionDefinitionOfRelatedPartyCapitalStockPercentage Members with 10 percent or more of the voting interests of our capital stock outstanding Accumulated Other Comprehensive Income [Member] Total Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] BANK OF AMERICA, NATIONAL ASSOCIATION BANK OF AMERICA, NATIONAL ASSOCIATION [Member] Amortized Cost of Hedged Asset Hedged Asset, Fair Value Hedge Subsequent Events [Text Block] Subsequent Events [Text Block] Bonds Debt Instrument, Fair Value Disclosure Payments of Dividends Payments of Dividends Fixed-rate, due in one year or less Federal Home Loan Bank, Advance, Fixed Rate, Year One Estimated fair value of held-to-maturity securities due in one year or less Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Debt Securities, Available-for-Sale, Restricted Debt Securities, Available-for-Sale, Restricted Supplemental voluntary contribution to AHP AHP Supplemental Voluntary Contribution Expense Voluntary AHP contributions reduce net income therefore reducing the statutory AHP assessment. The supplemental voluntary AHP contributions bring the statutory amount to what it would be in absence of voluntary contributions Federal Home Loan Bank, Affordable Housing Program Obligation [Table Text Block] Federal Home Loan Bank, Affordable Housing Program Obligation [Table Text Block] Maximum contractual maturity period of discount notes (up to one year) Consolidated Obligations, Discount Notes, Maximum Contractual Maturity Period Consolidated Obligations, Discount Notes, Maximum Contractual Maturity Period Statement [Line Items] Statement [Line Items] Total assets Assets Total interest expense Interest Expense, Operating Schedule of declared quarterly cash dividends Schedule of declared quarterly cash dividends [Table Text Block] Tabular disclosure of the Bank's declared and paid quarterly cash dividends. New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Total interest income Interest and Dividend Income, Operating Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Basis Adjustments for Discontinued Hedging Relationships included in Amortized Cost Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Federal funds sold Increase (Decrease) in Federal Funds Sold Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Shares Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Shares Gross unrealized gains on available-for-sale securities Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Net unrealized losses on available-for-sale securities Other Comprehensive Income (Loss), before Reclassifications, before Tax Other assets Increase (Decrease) in Other Operating Assets Issuance of capital stock (shares) Stock Issued During Period, Shares, New Issues Net change in interest-bearing deposits Increase (Decrease) in Deposits Bonds Interest Expense, Consolidated obligation Bonds Interest Expense, Other Long-Term Debt Due or convertible after four years through five years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Five Investment Holdings [Line Items] us-gaap_InvestmentHoldingsLineItems [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Affordable Housing Program assessment, net Payments for Affordable Housing Programs, net Net amount of cash outflow for payments made by the Federal Home Loan Banks (FHLBanks) to the Affordable Housing Program (AHP). Measurement Basis [Axis] Measurement Basis [Axis] Advances [Abstract] Advances [Abstract] Advances. Repurchase/redemption of capital stock shares Stock Repurchased and Retired During Period, Shares Variable-rate, due after one year Federal Home Loan Bank, Advance, Floating Rate, after Year One Mortgage loans: Payments for (Proceeds from) Loans and Leases [Abstract] Due after five years Federal Home Loan Bank, Advances, Maturities Summary, after Rolling Year Five Affordable Housing Program payable AHP liability balance, at beginning of period AHP liability balance, at end of period Federal Home Loan Bank, Affordable Housing Program Obligation Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Net Unrealized Gains (Losses) on Available-for-sale Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Capital stock, shares outstanding Common Stock, Shares, Outstanding Carrying Values and Estimated Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Payments for debt issuance costs Payments of Debt Issuance Costs Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Total comprehensive income Comprehensive income (loss) Comprehensive Income (Loss), Net of Federal Home Loan Bank Assessments, Attributable to Parent Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Liabilities: Liabilities, Fair Value Disclosure [Abstract] Basis Adjustments for Active Hedging Relationships included in Amortized Cost) Hedged Liability,Active Fair Value Hedge, Cumulative Increase (Decrease) Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk, active as of the balance sheet date. Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Deferred prepayment fees Deferred Prepayment Fees on Advances Deferred Prepayment Fees on Advances Offsetting Assets [Table Text Block] Offsetting Assets [Table Text Block] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Consolidated Obligation Bonds by Interest-Rate Payment Schedule Of Consolidated Obligation Bonds By Interest Rate Payment Terms [Table Text Block] Tabular disclosure of interest rate payment terms for debt. Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Bonds Repayments of Other Long-Term Debt Financial Instruments [Domain] Financial Instruments [Domain] Derivative assets Derivative Asset Total regulatory capital ratio, Actual Federal Home Loan Bank, Regulatory Capital Ratio, Actual Repurchase/redemption of capital stock Stock Repurchased During Period, Value Subclass B2 advances activity-based stock value outstanding fhlba: Subclass B2 advances activity-based stock value outstanding fhlba: Subclass B2 advances activity-based stock value outstanding Bonds, Due after three years through four years, weighted average interest rate Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturing in year four following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Government-sponsored enterprises [Member] Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Issuance of capital stock Stock Issued During Period, Value, New Issues Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Accrued interest payable Increase (Decrease) in Interest Payable, Net Debt Securities, Held-to-maturity [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract] Total variable-rate Federal Home Loan Bank, Advances, Floating Rate Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Mortgage Loans Held for Portfolio Schedule of Participating Mortgage Loans [Table Text Block] Estimated fair value of held-to-maturity securities due after one year through five years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Risk-based capital, Actual Federal Home Loan Bank, Risk-Based Capital, Actual Consolidated Obligation Bonds Outstanding, by Year of Contractual Maturity Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of Available-for-sale Securities Reconciliation Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Additional net credit exposure due to non-cash collateral pledged to counterparties in excess of the net derivative portion. Additional net credit exposure due to non-cash collateral pledged to counterparties in excess of the net derivative portion. Additional net credit exposure due to non-cash collateral pledged to counterparties in excess of the net derivative portion. Total, weighted average interest rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Commercial [Member] Multifamily [Member] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Bonds, Due after five years, weighted average interest rate Long-term Debt, Maturities, Repayments of Principal After Year Five, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturities after year five following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Subclass B1 membership stock value outstanding fhlba: Subclass B1 membership stock value outstanding fhlba: Subclass B1 membership stock value outstanding Adjustments for Change in Accounting Principle [Axis] Change in Accounting Principle, Type [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Due after four years through five years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Five Leverage capital ratio, Required Leverage Ratio, Required Leverage ratio requirement as defined in the regulations. Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Derivative [Line Items] Derivative [Line Items] Callable and Noncallable Consolidated Obligations Bonds Outstanding Schedule Of Consolidated Obligation Bonds By Call Feature [Table Text Block] Schedule of callable and noncallable consolidated obligation bonds outstanding. Debt Instrument Interest Rate Payment Terms, Name [Axis] Debt Instrument Interest Rate Payment Terms, Name [Axis] Debt instrument interest rate payment terms, name. Net stock reclassified to mandatorily redeemable capital stock Net capital stock reclassified to mandatorily redeemable capital stock Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value Advances [Member] Advances [Member] This item represents Federal Home Loan Bank loans (Advances). Entity File Number Entity File Number Due in one year or less, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Held-to-maturity securities classified by contractual maturity date Investments Classified by Contractual Maturity Date [Table Text Block] Capital stock, shares issued Common Stock, Shares, Issued Common Stock, Shares, Issued Adjustments for Change in Accounting Principle [Domain] Change in Accounting Principle, Type [Domain] Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Authorized voluntary housing contributions Authorized voluntary housing contributions Authorized voluntary housing contributions Direct grant disbursements Payment for Affordable Housing Program Obligation by Federal Home Loan Bank Total adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Statement, Equity Components [Axis] Equity Components [Axis] Other operating expenses Other Cost and Expense, Operating Available-for-Sale Classified by Contractual maturity date Available-for-Sale Classified by Contractual maturity date [Table Text Block] Available-for-Sale Classified by Contractual maturity date Entity Interactive Data Current Entity Interactive Data Current Available-for-sale Securities [Member] Available-for-Sale Securities [Member] Noninterest expense Noninterest Expense [Abstract] Due after one year through five years, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Entity Small Business Entity Small Business Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Affordable Housing Program [Text Block] Affordable Housing Program [Text Block] Discounts Debt Instrument, Unamortized Discount Subsequent Events [Abstract] Subsequent Events [Abstract] Net interest income Interest Income (Expense), Operating Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Callable [Member] Federal Home Loan Bank, Consolidated Obligations, Callable Option [Member] Right, but not the obligation, the Federal Home Loan Bank has to return the loan to the issuer at par without a prepayment penalty. Government-Sponsored Enterprises Debt Obligations [Member] US Government-sponsored Enterprises Debt Securities [Member] Total investment securities Marketable Securities Document Type Document Type Bonds, Due after two years through three years Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three Percent of Total Interest-bearing Deposits Federal Home Loan Bank Shareholder Percentage of Total Interest-bearing Deposits Represents Federal Home Loan Bank shareholder interest-bearing deposits outstanding as a percentage of total Federal Home Loan Banks interest-bearing deposits outstanding as of the balance sheet date. Allowance for Credit Loss Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Available-for-sale, Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Pension and postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent Percent of Total Par Value Advances Federal Home Loan Bank Shareholder Percentage of Total Par Value Advances Outstanding Represents Federal Home Loan Bank shareholder advances outstanding as a percentage of total Federal Home Loan Banks advances outstanding as of the balance sheet date. Due or convertible after two years through three years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Three Bonds, Due after two years through three years, weighted average interest rate Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturing in year three following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Interest-bearing deposits Interest Expense, Domestic Deposits Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Total voluntary AHP contributions Voluntary non-statutory AHP contributions Voluntary non-statutory AHP contributions Available-for sale. Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total other comprehensive income (loss) Total other comprehensive income (loss) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Advances Interest Income, Advances Interest Income, Federal Home Loan Bank Advances Minimum Schedule of Transactions with Shareholders [Line Items] Line items for Schedule of Transactions with Shareholders [Table] Income before assessment Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and contingencies (Note 11) Commitments and Contingencies Receivable Type [Axis] Receivable Type [Axis] Securities purchased under agreements to resell Proceeds from (Payments for) Securities Purchased under Agreements to Resell Investment securities: Marketable Securities [Abstract] Bonds, Due after four years through five years, weighted average interest rate Long-term Debt, Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate Weighted average interest rate of the amount of Consolidated Obligation Bonds maturing in year five following the date of the latest balance sheet, redeemable at fixed or determinable prices and dates. Estimated Fair Values Fair Value Disclosures [Text Block] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Retained earnings: Retained Earnings (Accumulated Deficit) [Abstract] Securities purchased under agreements to resell Securities Purchased under Agreements to Resell, Fair Value Disclosure Fair value disclosure of the carrying value of funds outstanding loaned in the form of security resale agreements if the agreement requires the purchaser to resell the identical security purchased or a security that meets the definition of "substantially the same." Also includes purchases of participations in pools of securities that are subject to a resale agreement. Transaction Type [Axis] Transaction Type [Axis] Long-term Debt By Maturity Type [Domain] Long-term Debt By Maturity Type [Domain] Provides categories for contractual maturity date or next call date of Consolidated Obligations. Schedule of Short-term Debt [Table] Short-Term Debt [Table] Allowance for Credit Loss Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Other assets, net Other Assets Financial Asset, 30 to 59 Days Past Due [Member] Financial Asset, 30 to 59 Days Past Due [Member] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Cash and due from banks Cash and Due from Banks Cash and Due from Banks Multifamily Housing Development Fund (1) Multifamily Housing Development Fund Multifamily Housing Development Fund Past Due Financing Receivables Financing Receivable, Past Due [Table Text Block] Financial Asset, Not Past Due Financial Asset, Not Past Due [Member] Amortized Cost of Hedged Liability Hedged Liability, Fair Value Hedge Noninterest income (loss) Noninterest Income [Abstract] Cash and due from banks at beginning of the period Cash and due from banks at end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Advances Federal Home Loan Bank Advances, Fair Value Disclosure Fair value disclosure of the aggregate carrying amount of all Federal Home Loan Bank loans (advances). Common Stock Dividend Subsequent Event - Annualized Rate Common Stock Dividend Subsequent Event - Annualized Rate Common Stock Dividend Subsequent Event - Annualized Rate Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Interest expense Interest Expense, Operating and Nonoperating [Abstract] Compensation and benefits Labor and Related Expense Proceeds from principal collected Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Discount Notes Unsettled Discount Notes [Member] Short-Term Debt [Member] Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Payments for repurchase/redemption of capital stock Payments for Repurchase of Common Stock Mortgage-backed securities [Member] Collateralized Mortgage-Backed Securities [Member] Discount notes Short-Term Debt, Fair Value Net Gains (Losses) on Fair Value Hedging Relationships Derivative Instruments, Gain (Loss) [Table Text Block] Total Amount of Fair Value Hedging Basis Adjustments Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Deposits with Other Federal Home Loan Banks Deposits with Other Federal Home Loan Banks Affordable Housing Program assessment Statutory AHP assessment Federal Home Loan Bank, Affordable Housing Program Obligation, Assessment Expense Total retained earnings Retained Earnings (Accumulated Deficit) Consolidated Obligation Discount Notes Schedule of Short-Term Debt [Table Text Block] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Short-term Debt [Line Items] Short-Term Debt [Line Items] Capital Stock Class B Putable [Member] Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Bonds Proceeds from Issuance of Other Long-Term Debt Discount notes weighted average interest rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time Derivative Contract [Domain] Derivative Contract [Domain] Transactions with Shareholders [Axis] Transactions with Shareholders [Axis] Transactions with Shareholders Financial Asset, Past Due Financial Asset, Past Due [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and capital Liabilities and Equity Summary of Callable Consolidated Obligation Bonds Outstanding, by Year of Contractual Maturity Schedule Of Maturities of Consolidated Obligation Bonds By Contractual Or Next Call Date [Table Text Block] Tabular disclosure of consolidated obligation bonds outstanding by year of contractual maturity or next call date. Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Other liabilities Increase (Decrease) in Other Operating Liabilities Cumulative Basis Adjustments for Fair Value Hedges Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Advances, net Proceeds from Sale of Federal Home Loan Bank Advances [Abstract] Proceeds from sale of federal home loan bank advances. Discount on EDGE advances Federal Home Loan Bank, Advances, Discount Purchases of long-term Payments to Acquire Held-to-Maturity Securities Total Amount of Fair Value Hedging Basis Adjustments Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Pension and postretirment Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Total regulatory capital, Required Federal Home Loan Bank, Regulatory Capital, Required Estimated fair value of Held-to-maturity securities due after five years through ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Heirs’ Property Family Wealth Protection Fund Heirs’ Property Family Wealth Protection Fund Heirs’ Property Family Wealth Protection Fund Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Leverage capital ratio, Actual Federal Home Loan Bank, Leverage Ratio, Actual Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Purchases of premises, equipment, and software Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Financial Asset, 60 to 89 Days Past Due [Member] Financial Asset, 60 to 89 Days Past Due [Member] Simple variable-rate [Member] Interest Rate Payment Type Simple Variable Rate [Member] Interest-rate payment type simple variable-rate. Debt Security Category [Axis] Debt Security Category [Axis] Federal funds sold Federal Funds Sold, Fair Value Disclosure Fair value disclosure of the amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements. Available-for-sale securities Interest Income, Debt Securities, Available-for-Sale, Operating Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Entity Filer Category Entity Filer Category Available-for-Sale, Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position Allocation of Voluntary Housing Contributions [Table Text Block] Allocation of Voluntary Contributions [Table Text Block] Allocation of Voluntary Contributions Fixed-rate long-term residential mortgage loans [Member] Loans Receivable With Fixed Rates of Interest Long Term [Member] A mortgage loan issued by a bank with a fixed rate of interest and a repayment period of more than 15 years. Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), before Federal Home Loan Bank Assessments Netting adjustments and cash collateral Total gross amounts of netting adjustments and cash collateral Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Advances, net Payments for (Proceeds from) Other Loans and Leases Due in one year or less, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Accrued interest receivable Interest Receivable Interest Receivable Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and entity information. Basis of Accounting Basis of Accounting [Text Block] Voluntary non-AHP contributions [Abstract] Voluntary non-AHP contributions [Abstract] Voluntary non-AHP contributions Fixed-rate medium-term residential mortgage loans [Member] Loans Receivable With Fixed Rates of Interest Medium Term [Member] A mortgage loan issued by a bank with a fixed rate of interest and a repayment period of 15 years or less. Number of Federal Home Loan Banks Number of Federal Home Loan Banks Number of Federal Home Loan Banks Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Mandatory redeemable capital stock Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Fair Value of Shares Hedging adjustments Federal Home Loan Bank, Advances, Valuation Adjustments for Hedging Activities Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Advances to Ten Largest Borrowers Federal Home Loan Bank Advances to Ten Largest Borrowers Federal Home Loan Bank Advances to Ten Largest Borrowers Residential [Member] Single Family [Member] Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability Derivative liabilities Derivative liabilities (1) Derivative Liability Entity Address, Address Line One Entity Address, Address Line One Total noninterest expense Noninterest Expense Gain (Loss) on Fair Value Hedges Recognized in Earnings Gain (Loss) on Fair Value Hedges Recognized in Earnings Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Discount notes Repayments of Other Short-Term Debt Available-for-Sale, Accrued Interest Receivable Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Held-to-Maturity Mortgage-backed securities, Fair Value Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Accumulated Other Comprehensive Income (Loss) [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Statement [Table] Statement [Table] Leverage capital, Required Federal Home Loan Bank, Leverage Capital, Required Components Comprising Accumulated Other Comprehensive Income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Premiums Debt Instrument, Unamortized Premium Variable-rate, due in one year or less Federal Home Loan Bank, Advance, Floating Rate, Year One Office of Finance Office of Finance, Cost Assessed on Federal Home Loan Bank Payments for repurchase/redemption of mandatorily redeemable capital stock Repayments of Mandatory Redeemable Capital Securities Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Bonds, Due after three years through four years Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four Federal Home Loan Banks [Abstract] Derivative Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Hedging adjustments Debt Valuation Adjustment for Hedging Activities Amount of unrealized gain (loss) recognized in earnings for the cumulative period of the debt obligation in a fair value hedge, as offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective. Discount notes Federal Home Loan Bank, Consolidated Obligations, Discount Notes Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]